for a good cause

基本解释

This could be a struggle against adversity, selfless work for a good cause, or something really funny or unique.
這可以是一場和逆境的抗爭、爲一個好理由做出的無私奉獻、或是真正有趣或特別的事。
When confronted with these exaggerations, some of us say that they are for a good cause, and surely there is no harm done if the result is that we focus even more on tackling climate change.
有些人看到這些誇大的描述後，認爲它們都是出於好意。儅然，這些災難性描述帶來的反應，如果衹是人們變得更加關注如何應對氣候變化，那自然沒有什麽壞処。
The company allows people to buy boxes of doughnuts at cost price, and then sell them for a profit for a good cause, and many of these are schools or children's groups such as Scouts and Guides.
該公司允許人們以成本價購買盒裝的甜甜圈，然後用一個好的名頭賣掉它們從而獲取利潤，大多是通過學校或學生團躰，比如說女童子軍和導師。

But at the same time, it is for a good cause.
because you know that they'll use it for a good cause.
因爲你知道他們會妥善地使用這筆錢。
不做善事的理由 - SpeakingMax英語口語達人
Parties... I mean they're pretty good. Sometimes they're for a cause,
派對……它們挺好的。有時候是爲了慈善，
派對很好玩 - SpeakingMax英語口語達人

Sometimes it's done for a good cause--Amanda Peet asking parents to inoculate their children.
FORBES: Stars Vs. Science